Spray Distribution of Plain Orifice Atomizer in Preheated Air Flow

Abstract:

An experiment by taking photos of the spray field behind plain orifice atomizer was conducted to study its atomization in preheated air flow. The air flow condition was 0.14~0.2 Mach number and 300~400°C. Fuel-to-air momentum flux ratio Q varied from 0.4 to 9, and Weber number We covered the range of 60~140. Photos were analyzed by Matlab image processing toolbox. The results indicate that under the experiment conditions: (1) Under the same temperature, jet breakup length increases with Q increasing, and decreases with the increase of We. (2) As the air flow temperature increases from 300°C to 400°C, jet and air flow interaction affect the liquid column breakup more greatly than surface tension. (3) Under the same temperature, spray angle increases with the increase of Q. (4) As the air flow temperature increases from 300°C to 400°C, evaporation affects the atomization more greatly than pneumatic nebulization.

• Periodical: Advanced Materials Research (Volumes 1070-1072)
• Pages: 1911-1916
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1070-1072.1911
• Online since: December 2014
• Authors: Jia Xing Qian, Yu Ying Liu*, Yi Xie, Zhi Wei Peng
• Keywords: Evaporation, High Speed Air Flow, Plain Orifice Atomizer, Preheated Air Flow, Spray Distribution

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